Cakbttbetor



J. AUDINC CARBURETOR May 2s, 1929.

Filed Deo. 2l, 1925 j, @w l.

yPatented May 28, l19.29.,

c v.rosriri ANDINO, or EAs'r BRADY, PENNSYLVANIA;

f iriaia WHC@ Partnr l' cAnBUnE'roii. A

Appiieauonniea recenter 21,1925. 'serial No. 76,789.

This invention relates to improvements in carburetors pertaining moreparticularly to a carburetor'of the type having no float but *feeding adirectvflow of gasoline to the car buretor and controlling said flow byan auto.n matic feed which in reality, takes theplace of the float inthe common and well known type of carburetor nowon the market.

The primary object of the invention is the provision of means Aforfeeding gasoline di- .rectly'to the carburetor.

" Another object of the invention the ypro-V vision of a carburetor inwhich gasoline is feddirectly to the carburetor and the feed of said'gasoline is controlled automatically through the medium of the enginespeed;

Another obj ect ofthe invention is the provision of a carburetor Y ofthe character described which will in operation, increase gasolinemileage andlprev'ent engine knocking.

A; still further object of the invention is the provision of acarburetor of the .character described which is constructed in a mannerto prevent ire in case the engine backfires vrAnother and further objectof "the invention vis the provision .of a carburetor of the characterdescribed Vwhich is cheap and simple of manufacture and readilyadaptable as a replacement to the common Aform` of carburetor.usuallvfound in useon hydrocarbonmotors.V

` provision of Lacarbu'retor which is practically automatic in operationthus vavoiding the necessity of adjustmentforuse withdiiferent types ofmotors.

Other further objects and novel features Y f of construction andimprovedresults ofthe invention .will appear in the following description andaccompanying drawing:

In the drawing: l j .Fgure 1 is a verticalsectional viewy of acarburetor made in accordance with this invention. Y Y

Figure 2 is an end Aview of the carburetor. a In describing theinvention in detail, refer- I fence being had to the .drawings in which:like parts I have designated'by .similar reference ward its open end 9so that this end of the body portion is slightly larger than the innerend. The open end 9 is closed by a door 10which is preferably mounted ona hinge 11 and normally held in-closed position by a suitable springcatch 12. YThe door is provided with an opening 13 to permit the passage of air into the carburetor and intake manifold. 1 y

The' air control comprises a pivotally mounted shutter 111, the end1570f whichV engages suitable depressions 16 in theface of the door sothat the shutter will remain in any position set when. operated by thehandle 17. It is readily apparent Vthat by rotatingthe Ashutter 17, thesize of the orifice can be varied at will.

Adjacent the inner end of the main carburetor housing or. casting thereis mounted a commonpform of butterfiythrottle valve 18. The constructionofthis valve is conventional and comprises the Valve 18 which iscarriedby a rotatably mounted shaft 19,-the upper end of which extends throughthe carburetor casting and carries a bell crank 20, one end 21 Vof whichis adapted to be connectedwith yan operating member, which is usuallylead for the sake of convenience to the dashboard of thejvehicle or tosuch other convenient position as to be readily operatedat will. As iscom mon in this construction, there is ,pro-

vided a stop 22 which is adapted to be engagedbythe stop member 23 whichforms a part of the bell crank.

' Positioned Within ythe carburetor, preferably at a point approximatelyintermediate its length, there is a regulator comprising a washer shapedmember 24 and a flap valve 25.Y .Due to the-tapered walls ofthe casting5, this member is held rigidly in place, although in the preferred forma set screw is provided vwhich penetrates the outer wall of thecarburetor and engages this member for further locking itin place.`l TheHap valve 25 is pivotallymounted on the washer member as at `26 and4closes the opening 27 in the washer.'

Rigidly` attached to the valve so as to move therewith, there is anoutwardly extending arm 28, this lever extending through 'the `washer'opening 27 to a Vpoint well in front vof the washer.

Gasoline is fed to the carburetor by means of thesupply pipe 29 which isiny communiwhich carries the needle valve 32. The plug 31 is a close litin the opening/'33 in the casiting 5, being vheld in place by tension ofthe spring 844r which exerts an upward pressure upon the L-shapedbracket 35 which bracket is in turn heldin any -desired position'-through the medium of the bolt 86 and nut 37 which form a part of thebracket 39- which is rigidly attached to the casting as at 40.

The needle valve 32 operates on a tapered seat 41 and is provided withan extending portion or rod 42 which extends downwardly into thecarburetor body at a pointabove thek flap valve operating lever 28. Theupward movement o1 the needle valve is controlled by the ad]ustmg screw43 `which extends downwardly through the chamber whereby this extendingend 44 is positioned at a point adjacent the upper face of the needlevalve.

ySuitably mounted on coil springs 45 posiv tioned on the upper face vofthe control llever 28, there is a plate 46 which is normally inengagement with the lower end of the needle valve stem or pin 42. f

A manual control for the flap valve 25 is provided in the form of a bellcrank 47 which is adapted to operate the shaft 48 which in turn operatesthe forwardly extending lever 49 which is provided with a cup-shapedouter lend 50 which engages the rod 51. The. rod

5l extends through the carburetor body 5 and upon 'the operation of thebell crank lever will engage the lever 28 so as to raise this lever andopen the needle valve. The rod 51 is normally in the positionv shown inFigure 1 of the drawings, by reason of the coil spring 52.

Connection is -led from the bell crank 47 to a point of Vconvenience foroperation, this connection being made with the arm 53 of the bell crank.f

Operation.

IVith the parts in the positions shown in Figure 1, the 'gasoline feedto the carburetor is closed. To enable the starting of the motor, it isnecessary to actuate the primer Awhich comprises .the operating arm 49,and

rod 51, soas to raise the flap valve lever 28 ywhich will cause theplate 46 to lift thencedle valve and permit the passage of gasoline ofthe carburetor is automatic.

to the motor, it being understood when the ,arm 28 is elevated, the flapvalve 25 is carried to an open position. In starting the motor, thethrottle control is always opened and for this reason the butteriyvalve, which is actuated through the throttle control, will p permit thethis valve further open and in so doing will elevate the outer end ofthe iap valve lever 28 which will in turn lift the needlevalve' topassage of a. greater amount of fuel. ,l

The automatic operationof the carburetor can be rcontrolled to a largedegree by the position of the shutter 14 as the engine can suck a volumeof air through the carburetor in amounts only in proportion to the sizeof the oriiice or opening l1V f -v f The movement of the needlevalvecanbe controlled by the regulating screw 'or stem 43. i` f g From theforegoing it willbe: seen that I have provided a carburetor forfeeding'fuel directly to the hydrocarbon carburetor and have eliminatedthe use'of a loat valve.

Furthermore it will be seen that theV operation of the carburetor afterthey motor has once started, is automatic,"and.that fuel in proportionto the speed of the motor will be furnished for the reason that thespeed of the motor controls the suction and velocity of the air throughthe'carburetor housing or casting 5. As the motor speeds up, a greateramount of fuel is drawn into the intake manifold and likewise .adiminishing amount of fuel is drawn in as the speedy of the motordecreases. y l Y l Furthermore, it will be seen. that the con-Astruction of the carburetor is simple and that further opening'of theilap valve Yafter the"Y needle valve has reached its limit of movement.'Until the needle valvej engages Vits stop 32 the springs-below the plate46 vhave Vnot been compressed. If, after the needle valve has reachedits stop and limit of movement, the throttle valve is opened wider,the

flap valve is accomplished through the compression of the platesprings`45. v In other i words, theV limit of movement of the needlevalve and flap valve is not the same nor is'it reached at the same time.Vhen the needle valve reaches itsV extreme open position enough gasolinecan pass to the mixing cham- 1 -ber to supply the engine at any speed,provided sun'icientl air is supplied. The connecs tion between the flapvalve and need-le valve is such as to permit a continued movement of theflap valve after the needle valve has A reached its extreme limit `ofmovement.

Having thus described my invention what I claim and desire to secure byLetters Patent 1s: f v

1. A carburetor comprising a mixing chamber having an air-intake andaffuel supply,

1'10 flap valve will be caused to open to agreater extent and thisadditional movement of the a needle valve in said fuel supply,saidneedle valve being normally closed and having an extending 'portionkprojecting into said mix-vV ing chamber, and an air-operated valvepivotj ally mounted in said mixing chamber and beextending portionprojecting into said mixing chamber, anl air operated valve pivotallymounted in said mixing chamber and being provided with an extendingmember carrying a'plate resiliently mounted thereabove and havingengagement with the extending portion of the needle valve, andadjustable meansto control the opening of the needle valve, for thepurpose described. i

3. A`v carburetor comprising a housing forming` a mixing chamber havingan air-intake and a. fuel supply, said fuel supply comprising a conduitextending into the mixing chamber and being adjustably mounted inrespect thereto, a needle valve extending .through said conduit having aportion projecting into the mixing chamber, and an airoperated valvepivotally mounted in the mixing chamber and being provided with'a-nextending member carrying upon its top a resiliently mounted platehaving engagement with the projecting portion of the needle valve,whereby said needle valve is opened and fuel supplied in amounts inproportion to the volume of air admitted.

4. A carburetor comprising .a mix-ing chamber having'an air-intake and afuel supply, a needle valve in said fuel supply, said needle valve beingnormally closed and having a projection into said chamber, anair-operated valve mounted in said chamber and positioned therein .at apoint intermediate the fuel supply inlet and outletside of the chamber,and said air-operated valve being provided'with an extending membercarrying a resiliently mounted plate having engagement with theprojecting kportion kof the needle v5. Acarlouretor comprising a mixingchamber having an air-intake and a fuel supply, means at the inlet endof said chamber to control the inlet of air to the same, a needle valvein said fuel supply,` said needle valve beinfrinormall closed andhavinoa ortion .a n b project-ing into the mlxing chamber, anairoperated valve pivotally mounted 1n the mixl ing chamber andpositioned therein at a point intermediate the fuel supply inlet andoutlet side of the chamber, said air-operated A valve being providedwith an extending member carrying a resiliently mounted plate havingengagement vwith the projecting portion of the needle valve foractuating the same,fan adjustable stop for the needle valve and saidresiliently mounted plate acting as a resilient stop for theair-operated valve, for the purpose described.

6. A carburetor comprising a mixing cham-V ber having an air intake anda fuel supply, a needle valve in said fuel supply, said needle valvebeing normally closed and having a projection into said" chamber, awasher mounted in (said chamberV and positioned therein at a pointintermediate the fuel supply inlet and the outlet side of the chamber,an air operated valve pivotally mounted upon said washer and having anintegral arm extending to a point beneath the needle valve and a plateresiliently mounted upon said arm and havingengagement with the proatingthe same.

7. A carburetor comprising a mixing chamber having an air intake and afuel supply, a needle ,valve in said fuel supply, said needle valvebeing normally closed and having its lower end projecting into saidmixing chamber, an air operated valve pivotally mounted in said mixingchamber and positioned therein at a point intermediate the fuel supplyinlet and the outlet side of the chamber, said air operated valve havingan integral arm extending to a position beneath the projecting end ofthe vneedle valve, and aplate resiliently supported upon said arm andhaving engagement withthe extending Vend of the needle valve, wherebysaid needle valve is opened and fuel is supplied in amounts inproportion to thev volume of .air admitted.

, 8. A carburetor comprising a tubular mixing'` chamber having an airintake and fuel supply, a needle valve controlling said fuel supply,said needle valve being normally closed and having an end proj eetinginto said mixing chamber, an air operated valve pivotally mounted insaid mixing chamber and positioned thereinV at a point intermediate thefuel supply inlet and the outlet side of the chamber, said air-operatedvalve norvmally closing said tubular chamber against the passage of airor fuel therethrough and provided with an arm extending lengthwise thesaid chamber to a position beneath the.

projecting end ofthe needle valve, and said Varm having operativeengagement with the extending end of the needle valve, whereby saidneedle valve is opened and fuel is sup- JOSEPH AUDINO.

jecting portion of the needle valve for actu- 4

